How To Fix /UI2/CDM3_EXP104 - &1 entity &2 has schema errors.

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI2/CDM3_EXP -

• Message number: 104

• Message text: &1 entity &2 has schema errors.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI2/CDM3_EXP104 - &1 entity &2 has schema errors. ?

  The SAP error message /UI2/CDM3_EXP104 indicates that there are schema errors related to a specific entity in the SAP Fiori/UI5 application. This error typically arises when there are inconsistencies or issues in the metadata definitions of the OData service or the underlying data model.
  Cause:
  
  Schema Mismatch: The entity definition in the OData service does not match the expected schema. This could be due to changes in the underlying database or model that have not been reflected in the OData service.
  Missing Annotations: Required annotations or properties may be missing from the entity definition.
  Data Type Issues: There may be data type mismatches between the entity definition and the actual data being returned by the service.
  Versioning Issues: If the OData service has been updated or versioned, the application may still be referencing an older version that has schema discrepancies.
  Service Activation: The OData service may not be properly activated or may have errors in its implementation.
  
  Solution:
  
  Check OData Service: Use the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to test the OData service and check for any schema errors or inconsistencies in the response.
  Regenerate Metadata: If there have been changes to the underlying data model, regenerate the metadata for the OData service. This can be done in the Service Builder (transaction /IWFND/MAINT_SERVICE).
  Review Annotations: Ensure that all required annotations and properties are correctly defined in the OData service.
  Check Data Types: Verify that the data types in the entity definition match the actual data being returned by the service.
  Activate/Reactivate Service: If the service is not activated, activate it. If it is already activated, try deactivating and reactivating it to refresh the service.
  Check for Updates: Ensure that you are using the latest version of the OData service and that any related components are up to date.
  
  Related Information:
  
  Transaction Codes:
  
  /IWFND/MAINT_SERVICE: To maintain OData services.
  /IWFND/GW_CLIENT: To test OData services.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues related to this error message.
  Documentation: Review the SAP Fiori and OData documentation for best practices in defining entities and services.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis or development team for further investigation, as they may have access to logs and additional tools to diagnose the problem.